JPWO2020230708A1 - - Google Patents

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Publication number
JPWO2020230708A1
JPWO2020230708A1 JP2021519405A JP2021519405A JPWO2020230708A1 JP WO2020230708 A1 JPWO2020230708 A1 JP WO2020230708A1 JP 2021519405 A JP2021519405 A JP 2021519405A JP 2021519405 A JP2021519405 A JP 2021519405A JP WO2020230708 A1 JPWO2020230708 A1 JP WO2020230708A1
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JP
Japan
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JP2021519405A
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Japanese (ja)
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JP7303871B2 (en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0075—Magnetic shielding materials
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/0018—Mixed oxides or hydroxides
    • C01G49/0045—Mixed oxides or hydroxides containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
    • H01F1/37—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles in a bonding agent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/004—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems using non-directional dissipative particles, e.g. ferrite powders
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0083—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive non-fibrous particles embedded in an electrically insulating supporting structure, e.g. powder, flakes, whiskers
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • C01P2004/16—Nanowires or nanorods, i.e. solid nanofibres with two nearly equal dimensions between 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/30—Particle morphology extending in three dimensions
    • C01P2004/32—Spheres
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/51—Particles with a specific particle size distribution
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2265—Oxides; Hydroxides of metals of iron
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/01—Magnetic additives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
    • H01F1/348—Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)
JP2021519405A 2019-05-14 2020-05-08 radio wave absorber Active JP7303871B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2019091322 2019-05-14
JP2019091322 2019-05-14
PCT/JP2020/018621 WO2020230708A1 (en) 2019-05-14 2020-05-08 Radio wave absorber

Publications (2)

Publication Number Publication Date
JPWO2020230708A1 true JPWO2020230708A1 (en) 2020-11-19
JP7303871B2 JP7303871B2 (en) 2023-07-05

Family

ID=73290154

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2021519405A Active JP7303871B2 (en) 2019-05-14 2020-05-08 radio wave absorber

Country Status (6)

Country Link
US (1) US20220059946A1 (en)
EP (1) EP3972401A4 (en)
JP (1) JP7303871B2 (en)
KR (1) KR102621282B1 (en)
CN (1) CN113812043B (en)
WO (1) WO2020230708A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102549185B1 (en) * 2022-09-16 2023-06-28 임윤희 Radar-absorbent materials

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09115708A (en) * 1995-10-16 1997-05-02 Nippon Telegr & Teleph Corp <Ntt> Electromagnetic wave absorbing material and package
JP2001156487A (en) * 1999-11-26 2001-06-08 Kyocera Corp Electromagnetic wave absorber and its manufacturing method
JP2002217586A (en) * 2001-01-22 2002-08-02 Sony Corp Radio wave absorber
JP2005231931A (en) * 2004-02-18 2005-09-02 Kobe Steel Ltd Cement type radio wave absorber
JP2013526775A (en) * 2010-05-10 2013-06-24 コリア インスティチュ−ト オブ マシナリ− アンド マテリアルズ Broadband electromagnetic wave absorber and manufacturing method thereof
JP2018110167A (en) * 2016-12-28 2018-07-12 国立研究開発法人産業技術総合研究所 Composite magnetic particle, electromagnetic wave absorber, and method of producing composite magnetic particle
WO2018235952A1 (en) * 2017-06-23 2018-12-27 マクセルホールディングス株式会社 Electromagnetic wave absorbing composition and electromagnetic wave absorption sheet
WO2019017471A1 (en) * 2017-07-20 2019-01-24 マクセルホールディングス株式会社 Electromagnetic wave absorbing composition, and electromagnetic wave absorption body

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0730279A (en) * 1993-07-15 1995-01-31 Nippon Telegr & Teleph Corp <Ntt> Wave absorber and its manufacture
JP2002223094A (en) * 2001-01-25 2002-08-09 Yokohama Rubber Co Ltd:The Structure of wave absorber
JP2002329995A (en) * 2001-05-07 2002-11-15 Shin Etsu Chem Co Ltd Electromagnetic wave absorbing body
JP2004077399A (en) * 2002-08-22 2004-03-11 Hitachi Ltd Milliwave radar
JP2004312696A (en) * 2003-03-24 2004-11-04 Hitachi Ltd Millimeter wave-radar and method for manufacturing the same
JP4153345B2 (en) * 2003-03-31 2008-09-24 独立行政法人科学技術振興機構 Method for producing SiC-hexagonal ferrite-based ceramics composite electromagnetic wave absorber
JPWO2005055366A1 (en) * 2003-11-14 2007-06-28 株式会社日立製作所 Automotive radar
KR100675514B1 (en) * 2005-04-08 2007-01-30 김동일 Electromagnetic wave shield material
JP4849220B2 (en) * 2005-10-03 2012-01-11 戸田工業株式会社 Electromagnetic interference suppression sheet and manufacturing method thereof, flat cable for high-frequency signal, and flexible printed circuit board
JP4674380B2 (en) * 2006-03-16 2011-04-20 Ｄｏｗａエレクトロニクス株式会社 Magnetic powder for radio wave absorber, manufacturing method, and radio wave absorber
JP4859791B2 (en) * 2006-09-01 2012-01-25 国立大学法人 東京大学 Magnetic crystals and radio wave absorbers for radio wave absorbing materials
JP5762453B2 (en) * 2012-09-28 2015-08-12 富士フイルム株式会社 Method for producing hexagonal ferrite magnetic particles, hexagonal ferrite magnetic particles obtained thereby, and use thereof
JP6764465B2 (en) * 2016-06-22 2020-09-30 マクセルホールディングス株式会社 Radio wave absorption sheet
JP7216360B2 (en) * 2017-06-30 2023-02-01 国立大学法人 東京大学 radio wave absorber
JP6524356B1 (en) * 2017-10-19 2019-06-05 関西ペイント株式会社 Radio wave absorption sheet for millimeter wave band and millimeter wave radio wave absorption method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09115708A (en) * 1995-10-16 1997-05-02 Nippon Telegr & Teleph Corp <Ntt> Electromagnetic wave absorbing material and package
JP2001156487A (en) * 1999-11-26 2001-06-08 Kyocera Corp Electromagnetic wave absorber and its manufacturing method
JP2002217586A (en) * 2001-01-22 2002-08-02 Sony Corp Radio wave absorber
JP2005231931A (en) * 2004-02-18 2005-09-02 Kobe Steel Ltd Cement type radio wave absorber
JP2013526775A (en) * 2010-05-10 2013-06-24 コリア インスティチュ−ト オブ マシナリ− アンド マテリアルズ Broadband electromagnetic wave absorber and manufacturing method thereof
JP2018110167A (en) * 2016-12-28 2018-07-12 国立研究開発法人産業技術総合研究所 Composite magnetic particle, electromagnetic wave absorber, and method of producing composite magnetic particle
WO2018235952A1 (en) * 2017-06-23 2018-12-27 マクセルホールディングス株式会社 Electromagnetic wave absorbing composition and electromagnetic wave absorption sheet
WO2019017471A1 (en) * 2017-07-20 2019-01-24 マクセルホールディングス株式会社 Electromagnetic wave absorbing composition, and electromagnetic wave absorption body

Also Published As

Publication number Publication date
CN113812043B (en) 2023-12-01
WO2020230708A1 (en) 2020-11-19
EP3972401A1 (en) 2022-03-23
JP7303871B2 (en) 2023-07-05
EP3972401A4 (en) 2022-06-29
US20220059946A1 (en) 2022-02-24
KR102621282B1 (en) 2024-01-05
CN113812043A (en) 2021-12-17
KR20210149802A (en) 2021-12-09

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